Regulators have reportedly closed MTN Guinea's headquarters in the country.

Ecofin Agency reported that MTN's HQ was closed by the Post and Telecommunications Regulatory Authority (ARPT) in the last week of December because of unpaid taxes, fees, and license fees.

It signals a potential exit from the market, something that MTN has explored for the past couple of years.

MTN was heavily linked with Axian over the sale of the telco's units in Guinea-Bissau, Guinea-Conakry, and Liberia last year, with the trio only contributing a combined 1.6 percent of the Group's annual revenue last year.

The South African operator is the second-biggest telco in Guinea with around 24 percent market share, well behind Orange, with 69 percent.

MTN has sought to shift its focus on its key markets and has also exited Yemen, Syria, and most recently agreed on a deal to exit Afghanistan.

MTN claims to serve 292 million customers across 19 markets.